Fieldlike and antidamping spin-orbit torques in as-grown and annealed Ta/CoFeB/MgO layers

We present a comprehensive study of the current-induced spin-orbit torques in perpendicularly magnetized Ta/CoFeB/MgO layers. The samples were annealed in steps up to 300 °C and characterized using x-ray-absorption spectroscopy, transmission electron microscopy, resistivity, and Hall effect measurem...

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Autores: Avci, Can Onur|||0000-0003-1226-2342, Garello, Kevin|||0000-0003-0236-322X, Nistor, Corneliu, Godey, Sylvie, Ballesteros, Belén|||0000-0002-1958-8911, Mugarza, Aitor|||0000-0002-2698-885X, Barla, Alessandro|||0000-0002-5632-4915, Valvidares, Manuel|||0000-0003-4895-8114, Pellegrin, Eric|||0000-0002-1648-0331, Ghosh, Abhijit, Miron, Ioan Mihai, Boulle, Olivier, Auffret, Stéphane, Gaudin, Gilles, Gambardella, Pietro|||0000-0003-0031-9217
Tipo de recurso: artículo
Fecha de publicación:2014
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:232132
Acceso en línea:https://ddd.uab.cat/record/232132
https://dx.doi.org/urn:doi:10.1103/PhysRevB.89.214419
Access Level:acceso abierto
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spelling Fieldlike and antidamping spin-orbit torques in as-grown and annealed Ta/CoFeB/MgO layersAvci, Can Onur|||0000-0003-1226-2342Garello, Kevin|||0000-0003-0236-322XNistor, CorneliuGodey, SylvieBallesteros, Belén|||0000-0002-1958-8911Mugarza, Aitor|||0000-0002-2698-885XBarla, Alessandro|||0000-0002-5632-4915Valvidares, Manuel|||0000-0003-4895-8114Pellegrin, Eric|||0000-0002-1648-0331Ghosh, AbhijitMiron, Ioan MihaiBoulle, OlivierAuffret, StéphaneGaudin, GillesGambardella, Pietro|||0000-0003-0031-9217We present a comprehensive study of the current-induced spin-orbit torques in perpendicularly magnetized Ta/CoFeB/MgO layers. The samples were annealed in steps up to 300 °C and characterized using x-ray-absorption spectroscopy, transmission electron microscopy, resistivity, and Hall effect measurements. By performing adiabatic harmonic Hall voltage measurements, we show that the transverse (fieldlike) and longitudinal (antidampinglike) spin-orbit torques are composed of constant and magnetization-dependent contributions, both of which vary strongly with annealing. Such variations correlate with changes of the saturation magnetization and magnetic anisotropy and are assigned to chemical and structural modifications of the layers. The relative variation of the constant and anisotropic torque terms as a function of annealing temperature is opposite for the fieldlike and antidamping torques. Measurements of the switching probability using sub-μs current pulses show that the critical current increases with the magnetic anisotropy of the layers, whereas the switching efficiency, measured as the ratio of magnetic anisotropy energy and pulse energy, decreases. The optimal annealing temperature to achieve maximum magnetic anisotropy, saturation magnetization, and switching efficiency is determined to be between 240 and 270°C. 22014-01-0120142014-01-01Articlehttp://purl.org/coar/resource_type/c_6501AMhttp://purl.org/coar/version/c_ab4af688f83e57aainfo:eu-repo/semantics/articleapplication/pdfhttps://ddd.uab.cat/record/232132https://dx.doi.org/urn:doi:10.1103/PhysRevB.89.214419reponame:Dipòsit Digital de Documents de la UABinstname:Universitat Autònoma de BarcelonaInglésengEuropean Commission https://doi.org/10.13039/501100000780 203239European Commission https://doi.org/10.13039/501100000780 318144Ministerio de Ciencia e Innovación https://doi.org/10.13039/501100004837 MAT2010-15659open accesshttp://purl.org/coar/access_right/c_abf2Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.https://rightsstatements.org/vocab/InC/1.0/info:eu-repo/semantics/openAccessoai:ddd.uab.cat:2321322026-06-06T12:50:31Z
dc.title.none.fl_str_mv Fieldlike and antidamping spin-orbit torques in as-grown and annealed Ta/CoFeB/MgO layers
title Fieldlike and antidamping spin-orbit torques in as-grown and annealed Ta/CoFeB/MgO layers
spellingShingle Fieldlike and antidamping spin-orbit torques in as-grown and annealed Ta/CoFeB/MgO layers
Avci, Can Onur|||0000-0003-1226-2342
title_short Fieldlike and antidamping spin-orbit torques in as-grown and annealed Ta/CoFeB/MgO layers
title_full Fieldlike and antidamping spin-orbit torques in as-grown and annealed Ta/CoFeB/MgO layers
title_fullStr Fieldlike and antidamping spin-orbit torques in as-grown and annealed Ta/CoFeB/MgO layers
title_full_unstemmed Fieldlike and antidamping spin-orbit torques in as-grown and annealed Ta/CoFeB/MgO layers
title_sort Fieldlike and antidamping spin-orbit torques in as-grown and annealed Ta/CoFeB/MgO layers
dc.creator.none.fl_str_mv Avci, Can Onur|||0000-0003-1226-2342
Garello, Kevin|||0000-0003-0236-322X
Nistor, Corneliu
Godey, Sylvie
Ballesteros, Belén|||0000-0002-1958-8911
Mugarza, Aitor|||0000-0002-2698-885X
Barla, Alessandro|||0000-0002-5632-4915
Valvidares, Manuel|||0000-0003-4895-8114
Pellegrin, Eric|||0000-0002-1648-0331
Ghosh, Abhijit
Miron, Ioan Mihai
Boulle, Olivier
Auffret, Stéphane
Gaudin, Gilles
Gambardella, Pietro|||0000-0003-0031-9217
author Avci, Can Onur|||0000-0003-1226-2342
author_facet Avci, Can Onur|||0000-0003-1226-2342
Garello, Kevin|||0000-0003-0236-322X
Nistor, Corneliu
Godey, Sylvie
Ballesteros, Belén|||0000-0002-1958-8911
Mugarza, Aitor|||0000-0002-2698-885X
Barla, Alessandro|||0000-0002-5632-4915
Valvidares, Manuel|||0000-0003-4895-8114
Pellegrin, Eric|||0000-0002-1648-0331
Ghosh, Abhijit
Miron, Ioan Mihai
Boulle, Olivier
Auffret, Stéphane
Gaudin, Gilles
Gambardella, Pietro|||0000-0003-0031-9217
author_role author
author2 Garello, Kevin|||0000-0003-0236-322X
Nistor, Corneliu
Godey, Sylvie
Ballesteros, Belén|||0000-0002-1958-8911
Mugarza, Aitor|||0000-0002-2698-885X
Barla, Alessandro|||0000-0002-5632-4915
Valvidares, Manuel|||0000-0003-4895-8114
Pellegrin, Eric|||0000-0002-1648-0331
Ghosh, Abhijit
Miron, Ioan Mihai
Boulle, Olivier
Auffret, Stéphane
Gaudin, Gilles
Gambardella, Pietro|||0000-0003-0031-9217
author2_role author
author
author
author
author
author
author
author
author
author
author
author
author
author
description We present a comprehensive study of the current-induced spin-orbit torques in perpendicularly magnetized Ta/CoFeB/MgO layers. The samples were annealed in steps up to 300 °C and characterized using x-ray-absorption spectroscopy, transmission electron microscopy, resistivity, and Hall effect measurements. By performing adiabatic harmonic Hall voltage measurements, we show that the transverse (fieldlike) and longitudinal (antidampinglike) spin-orbit torques are composed of constant and magnetization-dependent contributions, both of which vary strongly with annealing. Such variations correlate with changes of the saturation magnetization and magnetic anisotropy and are assigned to chemical and structural modifications of the layers. The relative variation of the constant and anisotropic torque terms as a function of annealing temperature is opposite for the fieldlike and antidamping torques. Measurements of the switching probability using sub-μs current pulses show that the critical current increases with the magnetic anisotropy of the layers, whereas the switching efficiency, measured as the ratio of magnetic anisotropy energy and pulse energy, decreases. The optimal annealing temperature to achieve maximum magnetic anisotropy, saturation magnetization, and switching efficiency is determined to be between 240 and 270°C.
publishDate 2014
dc.date.none.fl_str_mv 2
2014-01-01
2014
2014-01-01
dc.type.none.fl_str_mv Article
http://purl.org/coar/resource_type/c_6501
AM
http://purl.org/coar/version/c_ab4af688f83e57aa
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://ddd.uab.cat/record/232132
https://dx.doi.org/urn:doi:10.1103/PhysRevB.89.214419
url https://ddd.uab.cat/record/232132
https://dx.doi.org/urn:doi:10.1103/PhysRevB.89.214419
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv European Commission https://doi.org/10.13039/501100000780 203239
European Commission https://doi.org/10.13039/501100000780 318144
Ministerio de Ciencia e Innovación https://doi.org/10.13039/501100004837 MAT2010-15659
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
https://rightsstatements.org/vocab/InC/1.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Dipòsit Digital de Documents de la UAB
instname:Universitat Autònoma de Barcelona
instname_str Universitat Autònoma de Barcelona
reponame_str Dipòsit Digital de Documents de la UAB
collection Dipòsit Digital de Documents de la UAB
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